Mapped network drives don't work in Windows 10, version 1809

If you have static drive mappings, evidently Windows 10 1809 breaks them. I deployed about 20 workstations yesterday with 1809, and didn't notice this behavior, but we use a logon script that reconnects the drives each logon.

I also just got an email telling me that UPS Worldship is fubar this morning, so I get to figure out why 1809 is screwing with that too.